Water temperature and flow rate selection display and control sy

Details Water temperature and flow rate selection display and control sy Water temperature and flow rate selection display and control sy

1981-02-05

1983-12-13

Wise, Edward J.

Boots, shoes, and leggings

364502, 137561R, G06F 1546

Patent

active

044208111

ABSTRACT:
Apparatus and method for selecting, displaying and automatically controlling water flow rates and temperatures at the outlets of devices used in plumbing fixtures such as sinks, bathtubs, showers, or lavatories; the apparatus includes a temperature sensor at the water output, a control panel for selecting desired output water temperatures and flow rates, a comparator for comparing the selected temperature to the output temperature, and for generating signals to control separate hot and cold water valves to achieve and automatically maintain, within limits, any desired combination of flow rate and temperature. In one embodiment the comparator is embodied in a microprocessor which receives a digital signal representative of the actual water temperature, and generates a modified signal to adjust hot and cold water flow to the output means until the actual output temperature matches the selected temperature within a small error range while maintaining flow rate at a constant level.

REFERENCES:
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patent: 3878376 (1975-04-01), Sholes, Jr. et al.
patent: 3940600 (1976-02-01), Alexander et al.
patent: 4001807 (1977-01-01), Dallimonti
patent: 4074354 (1978-02-01), Nakagawa et al.
patent: 4202211 (1980-05-01), Perry
patent: 4215409 (1980-07-01), Strowe
patent: 4250747 (1981-02-01), Diprose et al.
patent: 4262686 (1981-04-01), Heim et al.
patent: 4275822 (1981-06-01), Juffa
patent: 4277832 (1981-07-01), Wong
Control System; J. F. McCabe et al; IBM Technical Disclosure Bulletin; vol. 12, No. 12, May 1970, p. 2064.

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